济阳坳陷石油运聚效率定量预测方法及应用

以济阳坳陷17个高勘探程度油气成藏体系为研究子集,分别应用生烃潜力法和发现过程模型法计算了各成藏体系的生烃量和资源量,求取了石油运聚效率的分布范围为4%~14%,不同成藏体系的石油运聚效率有较大差异.利用逐步回归方法建立了石油运聚效率与地质要素之间的定量关系,确定石油运聚效率的主控因素是排烃强度、油气运聚范围、构造变动次数、目的层倾角、断层密度等.车镇凹陷北是济阳坳陷低勘探程度成藏体系中远景资源量最大的成藏体系,应作为下步挖潜勘探的重点区之一.

Quantitatively predicting method of petroleum migration & accumulation coefficient and its Application in Jiyang Depression

The quantitative study on the petroleum migration & accumulation coefficient and the analysis of its main control factors are of importance to establishing scientific resource evaluation standard. Seventeen accumulation systems with higher exploration degree in Jiyang Depression being as the studied units, their hydrocarbon generation amount and resource amount are calculated by using hydrocarbon generation potential method and reservoir discovery process model method respectively. Their petroleum migration & accumulation coefficients are also calculated and range from 4 % to 14 %. There is greater difference among the petroleum migration & accumulation coefficients of different accumulation systems. The quantitative relationship between petroleum migration & accumulation coefficient and related geological factors is established by utilizing progressive regression method. Five parameters, i. e. the intensity of hydrocarbon expulsion, the scope of petroleum migration and accumulation, the number of tectonic events, the dip angle of target bed, and the density of faults, are determined to be the major controlling factors of petroleum migration & accumulation coefficient. The accumulation systems with lower exploration degree in the northern Chezhen Sag are the accumulation systems with greater resource potential in Jiyang Depression, and therefore, the northern Chezhen Sag should be one of the major zones for futrure exploration.